Abstract

GmRAV-transgenic tobacco plants exhibited decreased gibberellins (GAs) biosynthesis related phenotypes, including dwarfism and repressed flowering time. The dwarf phenotype of GmRAV-overexpressing (ox) tobaccos was fully restored in stem and hypocotyl length of transgenic plants by the application of exogenous GA3. The epidermal cells in the stem internodes of the GmRAV-ox tobacco plants treated with GA3 were obviously the same as those in wild-type plants in longitudinal direction. Therefore, the rescued plant height of GmRAV-ox tobaccos by GA3 might be largely caused by increased cell size. GmRAV overexpression inhibited GA biosynthesis due to a transcriptional repression of GA20ox gene. The dwarfed phenotype of GmRAV-ox tobaccos with reduced stem elongation could be caused by a reduction in GA3 content.

Journal

Russian Journal of Plant Physiology
– Springer Journals

Published: Aug 11, 2016

Recommended Articles

Loading...

References

Gibberellin biosynthesis: its regulation by endogenous and environmental signals

Yamaguchi, S.; Kamiya, Y.

The SOC1 MADSbox gene integrates vernalization and gibberellin signals for flowering in Arabidopsis